Gentlemen Prefer Blondes (1953)

Two showgirls (Jane Russell and Marilyn Monroe) cross the Atlantic on a first-class ocean liner and all the eligible men on board do their best to vie for their attention. Jane Russell’s character (Dorothy) picks the handsome ones; while Marilyn Monroe’s character (Lorelei) is out for the rich ones. She’s already engaged to a mega-wealthy guy named Gus, but Gus’s father forbids the marriage and sends a detective to follow them. And of course, being a 1950s technicolor musical, hijinks and musical numbers ensue.